674 Annals of the South African Museum. 



C. simulans Forel is not included in the above key, as it appears 

 to me that only the £ minor of that species has been described; it 

 differs from all the above species in having the eyes nearly half the 

 length of the sides of the head. 



G. mystaceus, Emery. (Plate IX, figs. 143, 143« & b). 

 Bull. Soc. Ent. Ital., vol. 18, p. 356, %, §. 1886. 



%, 13 - 5-15 mm. Head and thorax varying from ochreous r^ sty- 

 red to dark red (burnt sienna), the anterior margin of the head 

 darker or brownish. Coxae and femora dull ochreous, the femora 

 becoming darker towards their apices, scapes, tibiae and tarsi more 

 or less dark brown, flagellum ferruginous. Abdomen varying from 

 a yellowish brown becoming darker towards the apex to entirely 

 dark reddish brown. A very short, decumbent and scanty pubes- 

 cence on the tibiae, wanting elsewhere. The mesonotum and abdo- 

 minal segments with a very few short and thin exserted haiis. 

 Excepting the ammochaetae, the body is otherwise glabrous. r lie 

 moustache on the clypeus extends as far as the middle of the cl< sed 

 mandibles. Head and thorax subopaque, abdomen shining. Head 

 very closely reticulate-rugulose, more reticulate than in the maculatus 

 group. Clypeus longitudinally rugose or rugulose on the anterior 

 half. Thorax and abdomen microscopically and transversely rugulose. 



Head, excluding the mandibles, varying from one-ninth to one- 

 eighth wider than long, the sides fairly convex, not much narrower 

 in front than behind, the hind margin widely and not deeply emar- 

 ginate, the depth of the emargination being less than half the length 

 of the eye, the occipital lobes moderately angular and narrowly 

 rounded. The scape extends beyond the hind margin by about two- 

 fifths of its length. Eyes placed at the middle of the sides. Anterior 

 margin of the clypeus straight; the clypeus is moderately convex 

 transversely, its upper third convex lengthwise, the lower two-thirds 

 concave lengthwise. The pits or depressions between the median 

 and lateral pieces of the clypeus fairly deep. Mandibles 5-dentate, 

 the teeth large and acute, the apical tooth long, quite twice as long 

 as the subapical; the basal half dull and finely shagreened, the 

 apical half and the teeth shining, finely and sparsely punctured, the 

 basal margin bordered by a deep sulcus in which is inserted a row 

 of long hairs curving inwards towards the opposite mandible. Pro- 

 notum convex, about twice as wide as long. Pro-mesonotal suture 

 well defined. Mesonotum subovate, a trifle longer than wide. Meso- 

 metanotal suture feeble. The metanotum hardly defined. Dorsum 



